adding Freeipa to Ovirtengine

Hello , i have 4 servers in my work one for ipa . one for the hyper one for ovirt engine one is a file server and i use an external DNS server well the problem is that the ovirt engine server can not authenticat to ipa server when a want to add the Freeipa server to the the ovirt engine by the command "engine-manage-domains add --provider=ipa --domain=mydomaine.com --user=admin" it shows the following message "Error: exception message: Aucun chemin d'accès pour atteindre l'hôte cible Failure while testing domain fso.ump.ma. Details: Kerberos error. Please check log for further details." i have 2 users in Freeipa.All servers can ping to each other. I tried all the solutions on the mail list and the internet and it did not work . hope there is a solution for this problem . thnks.